US4196106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber-reinforced rubber article and process for producing the same
Assignee: Ube Corp
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Filing: 1977-09-29
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Granted: 1980-04-01
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Expires: 1997-09-29
Abstract
Abstract Disclosed is a process of producing a fiber-reinforced rubber article having excellent mechanical strength and modulus of elasticity, and exhibiting rubber-like elasticity, by providing a rubber composition from a vulcanizable rubber material, a vulcanizing agent and 1,2-polybutadiene staple fibers in an amount of 1 to 20 parts by weight per 100 parts by weight of the rubber material, shaping and vulcanizing the rubber composition to provide a shaped, vulcanized article in which surface portions of said 1,2-polybutadiene staple fibers are vulcanized and cross-linked to the vulcanized rubber material matrix.
Inventors
- 👤 Tetsuro Matsuura
- 👤 Shinji Yamamoto
- 👤 Denichi Oda
- 👤 Yasuo Matsumori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:22
CPC Classifications
C; C08; C08L; C08L21/00; Y; Y10; Y10S; Y10S525/00; Y10S525/914
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
151 words
A process for producing a fiber-reinforced rubber article, which comprises: (1) preparing a composition comprising a matrix containing a rubber material selected from the group consisting of natural rubber, cis-1,4-polybutadiene, polyisoprene, polychloroprene, styrene-butadiene copolymers, isoprene-isobutylene copolymers, ethylene-propylene-diene terpolymers, and mixtures of two or more of the above-mentioned polymers; a vulcanizing agent, and reinforcing staple fibers which consist of 1,2-polybutadiene containing 80% by weight or more of 1,2-structure and are uniformly dispersed in said matrix, said reinforcing staple fibers each having a cross-sectional diameter of from 4 to 90 microns and a length of from 1 to 200 mm and being present in an amount of from 1 to 20 parts by weight per 100 parts by weight of said rubber matrix, and; (2) shaping and vulcanizing said composition at a temperature of at least 10° C. below the melting point of said 1,2-polybutadiene staple fibers to form a shaped, vulcanized article.
Claim 2
Dependent Claim
151 words
A process for producing a fiber-reinforced rubber article, which comprises: (1) preparing a composition comprising a matrix containing a rubber material selected from the group consisting of natural rubber, cis-1,4-polybutadiene, polyisoprene, polychloroprene, styrene-butadiene copolymers, isoprene-isobutylene copolymers, ethylene-propylene-diene terpolymers, and mixtures of two or more of the above-mentioned polymers; a vulcanizing agent, and reinforcing staple fibers which consist of 1,2-polybutadiene containing 80% by weight or more of 1,2-structure and are uniformly dispersed in said matrix, said reinforcing staple fibers each having a cross-sectional diameter of from 4 to 90 microns and a length of from 1 to 200 mm and being present in an amount of from 1 to 20 parts by weight per 100 parts by weight of said rubber matrix, and; (2) shaping and vulcanizing said composition at a temperature of at least 10° C. below the melting point of said 1,2-polybutadiene staple fibers to form a shaped, vulcanized article.
Claim 3
Dependent Claim
23 words
A process as claimed in claim 1, wherein said 1,2-polybutadiene fibers have a tensile strength of at least 1×10 3 kg/cm 2 .
Claim 4
Dependent Claim
29 words
A process as claimed in claim 2, wherein the tensile strength of said 1,2-polybutadiene fibers is in a range of from 1×10 3 to 1×10 4 kg/cm 2 .
Claim 5
Dependent Claim
25 words
A process as claimed in claim 1, wherein said 1,2-polybutadiene fibers have an initial modulus of elasticity of at least 1×10 4 kg/cm 2 .
Claim 6
Dependent Claim
31 words
A process as claimed in claim 4, wherein the initial modulus of elasticity of said 1,2-polybutadiene fibers is in a range of from 1×10 4 to 1×10 5 kg/cm 2 .
Claim 7
Dependent Claim
24 words
A process as claimed in claim 1, wherein said vulcanizing agent is selected from the group consisting of sulphur, organic peroxides and mixtures thereof.
Claim 8
Dependent Claim
21 words
A process as claimed in claim 1, wherein said vulcanizing temperature is in a range of from 120° to 180° C.
Claim 9
Dependent Claim
26 words
A process as claimed in claim 1, wherein said composition includes a member selected from the group consisting of resorcin, hexamethylenetetramine, powdered silica and mixtures thereof.
Claim 10
Dependent Claim
19 words
A process as claimed in claim 1, wherein said shaping process is carried out simultaneously with said vulcanizing process.
Claim 11
Dependent Claim
17 words
A process as claimed in claim 1, wherein said shaping process is followed by said vulcanizing process.
Claim 12
Dependent Claim
154 words
A fiber-reinforced rubber article comprising: (1) a matrix of rubber material, which rubber material is selected from the group consisting of natural rubber, cis-1,4-polybutadiene, polyisoprene, polychloroprene, styrenebutadiene copolymers, isoprene-isobutylene copolymers, ethylenepropylene-diene terpolymers, and mixtures of two or more of the above-mentioned polymers, and; (2) reinforcing staple fibers which consist of 1,2-polybutadiene containing 80% by weight or more 1,2-structure and are uniformly dispersed in said matrix, said reinforcing staple fibers each having a cross-sectional diameter of from 4to 90 microns and a length of from 1 to 200 mm and being present in an amount of from 1 to 20 parts by weight per 100 parts by weight of said rubber matrix, and said rubber matrix and surface portion of said 1,2-polybutadiene staple fibers being vulcanized at a temperature of at least 10° C. below the melting point of said 1,2-polybutadiene staple fibers to form cross-linkages between said 1,2-polybutadiene staple fibers and said rubber matrix.
Claim 13
Dependent Claim
154 words
A fiber-reinforced rubber article comprising: (1) a matrix of rubber material, which rubber material is selected from the group consisting of natural rubber, cis-1,4-polybutadiene, polyisoprene, polychloroprene, styrenebutadiene copolymers, isoprene-isobutylene copolymers, ethylenepropylene-diene terpolymers, and mixtures of two or more of the above-mentioned polymers, and; (2) reinforcing staple fibers which consist of 1,2-polybutadiene containing 80% by weight or more 1,2-structure and are uniformly dispersed in said matrix, said reinforcing staple fibers each having a cross-sectional diameter of from 4to 90 microns and a length of from 1 to 200 mm and being present in an amount of from 1 to 20 parts by weight per 100 parts by weight of said rubber matrix, and said rubber matrix and surface portion of said 1,2-polybutadiene staple fibers being vulcanized at a temperature of at least 10° C. below the melting point of said 1,2-polybutadiene staple fibers to form cross-linkages between said 1,2-polybutadiene staple fibers and said rubber matrix.
Claim 14
Dependent Claim
36 words
A fiber-reinforced rubber article as claimed in claim 11, wherein the ratio (L/D) of the length (L) to the cross-sectional diameter (D) of said 1,2-polybutadiene staple fibers is in a range of from 20 to 200.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |